WinForm下Excel导入与导出

导入：

        private void Btn_import_Click(object sender, RoutedEventArgs e)
        {
            System.Windows.Forms.OpenFileDialog openImageDialog = new System.Windows.Forms.OpenFileDialog();
            openImageDialog.Filter = "Excel Files (*.xls;*.xlsx)|*.xls;*.xlsx";
            openImageDialog.Multiselect = false;

            if (openImageDialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                _service.Import(openImageDialog.FileName); //这里已经获取到了本地文件的绝对路径
            }
        }

  internal void Import(string filePath)
        {
            try
            {
                //TODO  执行把Excel中的数据转换成DBSet的方法
                DataSet dt = ExcelHelper.ImportFromExcel(filePath, 0);
                if (dt.Tables.Count <= 0) { MessageBox.Show("导入表格不能为空！"); return; }
                var ExportDatas = dt.Tables[0].AsEnumerable().ToList();
                //这里已经把Excel中的数据转换成了List<DataRow>的形式，下面就是写入数据库
                MessageBox.Show("导入成功！");
            }
            catch (Exception e)
            {
                MessageBox.Show("发生了异常，建议导入之前请先关闭此文件，如果仍不能正常导入请联系管理员！");
            }
        }

        public static DataSet ImportFromExcel(string excelFilePath, int headerRowIndex)
        {
            using (FileStream stream = System.IO.File.OpenRead(excelFilePath))
            {
                //根据filePath(绝对路径)获取到excel文件
                bool isCompatible = GetIsCompatible(excelFilePath);
                return ImportFromExcel(stream, headerRowIndex, isCompatible);
            }
        }

      public static bool GetIsCompatible(string filePath)
        {
            return filePath.EndsWith(".xls", StringComparison.OrdinalIgnoreCase);
        }

        public static DataSet ImportFromExcel(Stream excelFileStream, int headerRowIndex, bool isCompatible)
        {
            DataSet ds = new DataSet();
            IWorkbook workbook = CreateWorkbook(isCompatible, excelFileStream);
            for (int i = 0; i < workbook.NumberOfSheets; i++)
            {
                //循环sheet页 转行成DataTable插入到DbSet中
                ISheet sheet = workbook.GetSheetAt(i);
                DataTable table = GetDataTableFromSheet(sheet, headerRowIndex);
                if (table != null) ds.Tables.Add(table);
                else break;
            }

            excelFileStream.Close();
            workbook = null;

            return ds;
        }

        /// <summary>
        /// 创建工作薄(依据文件流)
        /// </summary>
        /// <param name="isCompatible"></param>
        /// <param name="stream"></param>
        /// <returns></returns>
        public static IWorkbook CreateWorkbook(bool isCompatible, dynamic stream)
        {
            if (isCompatible)
            {
                return new HSSFWorkbook(stream);
            }
            else
            {
                return new XSSFWorkbook(stream);
            }
        }

 /// <summary>
        /// 从工作表中生成DataTable
        /// </summary>
        /// <param name="sheet"></param>
        /// <param name="headerRowIndex"></param>
        /// <returns></returns>
        private static DataTable GetDataTableFromSheet(ISheet sheet, int headerRowIndex)
        {
            DataTable table = new DataTable();
            //获取行数
            IRow headerRow = sheet.GetRow(headerRowIndex);
            if (headerRow == null) return null;
            //获取列数
            int cellCount = headerRow.LastCellNum;
            //这个循环是循环插入列
            for (int i = headerRow.FirstCellNum; i < cellCount; i++)
            {
                if (string.IsNullOrEmpty(headerRow.GetCell(i).ToString()))
                {
                    // 如果遇到第一个空列，则不再继续向后读取
                    cellCount = i + 1;
                    break;
                }
                DataColumn column = new DataColumn(headerRow.GetCell(i).ToString());
                if (table.Columns.Contains(column.ToString()))
                {
                    MessageBox.Show("导入数据列中存在相同的列名！");
                    return null;
                }
                table.Columns.Add(column);
            }
            ICell cell = null;
            try
            {
                //这个循环是循环插入数据行
                for (int i = (headerRowIndex + 1); i <= sheet.LastRowNum; i++)
                {
                    IRow row = sheet.GetRow(i);

                    if (row != null)
                    {
                        cell = row.Cells[0];
                        if (row.Cells[0].CellType==CellType.Blank)
                        {
                            continue;
                        }
                        DataRow dataRow = table.NewRow();

                        for (int j = row.FirstCellNum; j < cellCount; j++)
                        {
                            if (row.GetCell(j) != null)
                            {
                                dataRow[j] = row.GetCell(j).ToString();
                            }
                        }
                        table.Rows.Add(dataRow);
                    }
                }
            }
            catch (Exception)
            {
                return null;
            }
            return table;
        }

导出：

  private void Btn_export_Click(object sender, RoutedEventArgs e)
        {
            System.Windows.Forms.SaveFileDialog saveImageDialog = new System.Windows.Forms.SaveFileDialog();
            saveImageDialog.Filter = "Excel Files (*.xls;*.xlsx)|*.xls;*.xlsx";
            if (saveImageDialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                _service.Export(saveImageDialog.FileName, GetFilter());
            }
            else
            {
            }
        }

  internal async void Export(string filePath, QC_TestProjectConfigFilter filter)
        {
            HSSFWorkbook workbook = new HSSFWorkbook();
            ICellStyle StrStyle = ExcelHelper.Getcellstyle(workbook, true, false, 10, NPOI.SS.UserModel.HorizontalAlignment.Center, NPOI.SS.UserModel.VerticalAlignment.Center, BorderStyle.Thin, BorderStyle.Thin, BorderStyle.Thin, BorderStyle.Thin);
            ISheet sheet = workbook.CreateSheet("综合配置");

            IRow rowTitle = sheet.CreateRow(0);
            rowTitle.Height = 25 * 20;
            ICell cellTitle0 = rowTitle.CreateCell(0);
            ExcelHelper.writeToHeadCell(workbook, cellTitle0, "Id", sheet, 0);

            ICell cellTitle1 = rowTitle.CreateCell(1);
            ExcelHelper.writeToHeadCell(workbook, cellTitle1, "质检分类", sheet, 1);

            ICell cellTitle2 = rowTitle.CreateCell(2);
            ExcelHelper.writeToHeadCell(workbook, cellTitle2, "检验项目", sheet, 2);
       
            StringBuilder sql = new StringBuilder();
            sql.AppendLine("SELECT TPC.*,S.SamplePlan,TP.Name AS TestName FROM QC_TestProjectConfig TPC ");
            sql.AppendLine("LEFT JOIN QC_Sampling S ON TPC.SampleId=S.Id ");
            sql.AppendLine("LEFT JOIN QC_TestProject TP ON TPC.TestId=TP.Id ");
            sql.AppendLine("WHERE 1=1 ");
            sql.AppendLine("AND (TPC.StationName LIKE @StationName OR @StationName= NULL) ");
            sql.AppendLine("AND (TPC.InspectionType LIKE @InspectionType OR @InspectionType= NULL) ");
            sql.AppendLine("AND (S.Id like @SampleId OR @SampleId=null)  ");
            sql.AppendLine("AND (TP.Id LIKE @TestId OR @TestId=NULL) ");
            using (var db = new SqlConnection(SqlDB.ConnectionStringLocalTransaction))
            {
                var QC_TestProjectConfigs = await db.QueryAsync<QC_TestProjectConfig>(sql.ToString(), new { StationName = string.Format("%{0}%", filter.StationName), InspectionType = string.Format("%{0}%", filter.InspectionType), SampleId = string.Format("%{0}%", filter.SampleId), TestId = string.Format("%{0}%", filter.TestId) });
                int rowIndex = 1;
                foreach (QC_TestProjectConfig data in QC_TestProjectConfigs)
                {
                    int columnindex = 0;
                    IRow rowData = sheet.CreateRow(rowIndex++);
                    rowData.Height = 25 * 20;
                    ExcelHelper.WriteCell(rowData, columnindex++, StrStyle, data.Id.ToString());
                    ExcelHelper.WriteCell(rowData, columnindex++, StrStyle, data.StationName);
                    ExcelHelper.WriteCell(rowData, columnindex++, StrStyle, data.TestName);           

                }
            }
            FileStream stream = new FileStream(filePath, FileMode.Create);
            workbook.Write(stream);
            stream.Close();
            stream.Dispose();
            MessageBox.Show("导出成功！");
        }

同样声明一些公共方法

        public enum stylexls
        {
            头,
            表头,
            加粗居中,
            副标题,
            url,
            时间,
            数字,
            钱,
            百分比,
            中文大写,
            科学计数法,
            默认
        }

//写标题单元格
     public static void writeToHeadCell(HSSFWorkbook workbook, ICell cell, string value, ISheet sheet,int i)
        {
            if (value == "Id") { sheet.SetColumnWidth(i, 25 * 400); }
            else { sheet.SetColumnWidth(i, 25 * 180); }
           
            cell.CellStyle = ExcelHelper.Getcellstyle(workbook, stylexls.加粗居中, true);
            cell.CellStyle.VerticalAlignment = NPOI.SS.UserModel.VerticalAlignment.Center;
            cell.SetCellValue(value);
        }

//写数据单元格
        public static void WriteCell(IRow row, int ColumnIndex, ICellStyle CellStyle, string Value)
        {
            ICell icelltop = row.CreateCell(ColumnIndex);
            icelltop.CellStyle = CellStyle;
            icelltop.SetCellValue(Value);
        }

        #region 定义单元格常用到样式
        public static ICellStyle Getcellstyle(IWorkbook wb, stylexls str, bool IsBold, string fontName = "仿宋_GB2312")
        {
            ICellStyle cellStyle = wb.CreateCellStyle();
            //定义几种字体  
            //也可以一种字体，写一些公共属性，然后在下面需要时加特殊的  
            IFont fontTitle = wb.CreateFont();
            fontTitle.FontHeightInPoints = 24;
            fontTitle.Boldweight = 1;
            fontTitle.FontName = fontName;

            IFont fontSmallTitle = wb.CreateFont();
            fontSmallTitle.Boldweight = (short)FontBoldWeight.Bold;
            fontSmallTitle.FontHeightInPoints = 10;
            fontSmallTitle.FontName = fontName;

            IFont font = wb.CreateFont();
            font.FontHeightInPoints = 10;
            font.FontName = fontName;
            //font.Underline = 1;下划线  

            IFont fontcolorblue = wb.CreateFont();
            fontcolorblue.Color = HSSFColor.OliveGreen.Blue.Index;
            fontcolorblue.IsItalic = true;//下划线  
            fontcolorblue.FontName = fontName;

            //边框颜色  
            //cellStyle.BottomBorderColor = HSSFColor.OliveGreen.Blue.Index;
            //cellStyle.TopBorderColor = HSSFColor.OliveGreen.Blue.Index;  
            //cellStyle.FillForegroundColor = HSSFColor.White.Index;
            //cellStyle.FillBackgroundColor = HSSFColor.Blue.Index;

            if (IsBold)
            {
                //边框厚度
                cellStyle.BorderBottom = BorderStyle.Thin;
                cellStyle.BorderLeft = BorderStyle.Thin;
                cellStyle.BorderRight = BorderStyle.Thin;
                cellStyle.BorderTop = BorderStyle.Thin;
            }

            //水平对齐  
            cellStyle.Alignment = NPOI.SS.UserModel.HorizontalAlignment.Left;

            //垂直对齐  
            cellStyle.VerticalAlignment = NPOI.SS.UserModel.VerticalAlignment.Center;

            //自动换行  
            cellStyle.WrapText = true;

            //缩进;当设置为1时，前面留的空白太大了。希旺官网改进。或者是我设置的不对  
            cellStyle.Indention = 0;

            //上面基本都是设共公的设置  
            //下面列出了常用的字段类型  
            switch (str)
            {
                case stylexls.头:
                    cellStyle.Alignment = NPOI.SS.UserModel.HorizontalAlignment.Center;
                    cellStyle.SetFont(fontTitle);
                    break;
                case stylexls.表头:
                    cellStyle.Alignment = NPOI.SS.UserModel.HorizontalAlignment.Center;
                    cellStyle.SetFont(font);
                    break;
                case stylexls.加粗居中:
                    cellStyle.Alignment = NPOI.SS.UserModel.HorizontalAlignment.Center;
                    cellStyle.SetFont(fontSmallTitle);
                    break;
                case stylexls.副标题:
                    cellStyle.SetFont(fontSmallTitle);
                    break;
                case stylexls.时间:
                    IDataFormat datastyle = wb.CreateDataFormat();
                    cellStyle.DataFormat = datastyle.GetFormat("yyyy/mm/dd");
                    cellStyle.SetFont(font);
                    break;
                case stylexls.数字:
                    cellStyle.DataFormat = HSSFDataFormat.GetBuiltinFormat("0.00");
                    cellStyle.SetFont(font);
                    break;
                case stylexls.钱:
                    IDataFormat format = wb.CreateDataFormat();
                    cellStyle.DataFormat = format.GetFormat("￥#,##0");
                    cellStyle.SetFont(font);
                    break;
                case stylexls.url:
                    fontcolorblue.Underline = FontUnderlineType.Single;
                    cellStyle.SetFont(fontcolorblue);
                    break;
                case stylexls.百分比:
                    cellStyle.DataFormat = HSSFDataFormat.GetBuiltinFormat("0.00%");
                    cellStyle.SetFont(font);
                    break;
                case stylexls.中文大写:
                    IDataFormat format1 = wb.CreateDataFormat();
                    cellStyle.DataFormat = format1.GetFormat("[DbNum2][$-804]0");
                    cellStyle.SetFont(font);
                    break;
                case stylexls.科学计数法:
                    cellStyle.DataFormat = HSSFDataFormat.GetBuiltinFormat("0.00E+00");
                    cellStyle.SetFont(font);
                    break;
                case stylexls.默认:
                    cellStyle.SetFont(font);
                    break;
            }
            return cellStyle;
        }
        public static ICellStyle Getcellstyle(IWorkbook wb, bool IsBold, bool IsStrong, int FontSize, NPOI.SS.UserModel.HorizontalAlignment HAlignment, NPOI.SS.UserModel.VerticalAlignment VAlignment, BorderStyle BottomStyle, BorderStyle LeftStyle, BorderStyle RightStyle, BorderStyle TopStyle, stylexls DataType, string fontName = "仿宋_GB2312")
        {
            ICellStyle cellStyle = wb.CreateCellStyle();
            IFont font = wb.CreateFont();
            font.FontHeightInPoints = (short)FontSize;
            font.FontName = fontName;
            if (IsStrong)
            {
                font.Boldweight = (short)FontBoldWeight.Bold;
            }
            if (IsBold)
            {
                //边框厚度
                cellStyle.BorderBottom = BottomStyle;
                cellStyle.BorderLeft = LeftStyle;
                cellStyle.BorderRight = RightStyle;
                cellStyle.BorderTop = TopStyle;
            }
            switch (DataType)
            {
                case stylexls.时间:
                    IDataFormat datastyle = wb.CreateDataFormat();
                    cellStyle.DataFormat = datastyle.GetFormat("yyyy/mm/dd");
                    cellStyle.SetFont(font);
                    break;
                case stylexls.数字:
                    cellStyle.DataFormat = HSSFDataFormat.GetBuiltinFormat("0.00");
                    cellStyle.SetFont(font);
                    break;
                case stylexls.钱:
                    IDataFormat format = wb.CreateDataFormat();
                    cellStyle.DataFormat = format.GetFormat("￥#,##0");
                    cellStyle.SetFont(font);
                    break;
                case stylexls.百分比:
                    cellStyle.DataFormat = HSSFDataFormat.GetBuiltinFormat("0.00%");
                    cellStyle.SetFont(font);
                    break;
                case stylexls.中文大写:
                    IDataFormat format1 = wb.CreateDataFormat();
                    cellStyle.DataFormat = format1.GetFormat("[DbNum2][$-804]0");
                    cellStyle.SetFont(font);
                    break;
                case stylexls.科学计数法:
                    cellStyle.DataFormat = HSSFDataFormat.GetBuiltinFormat("0.00E+00");
                    cellStyle.SetFont(font);
                    break;
                case stylexls.默认:
                    cellStyle.SetFont(font);
                    break;
            }
            //水平对齐  
            cellStyle.Alignment = HAlignment;
            //垂直对齐  
            cellStyle.VerticalAlignment = VAlignment;
            //自动换行  
            cellStyle.WrapText = true;
            //缩进;当设置为1时，前面留的空白太大了。希旺官网改进。或者是我设置的不对  
            cellStyle.Indention = 0;
            return cellStyle;
        }

        #endregion

        public static ICellStyle Getcellstyle(IWorkbook wb, bool IsBold, bool IsStrong, int FontSize, NPOI.SS.UserModel.HorizontalAlignment HAlignment, NPOI.SS.UserModel.VerticalAlignment VAlignment, BorderStyle BottomStyle, BorderStyle LeftStyle, BorderStyle RightStyle, BorderStyle TopStyle)
        {
            return Getcellstyle(wb, IsBold, IsStrong, FontSize, HAlignment, VAlignment, BottomStyle, LeftStyle, RightStyle, TopStyle, stylexls.默认);
        }